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Issue 752500 link

Starred by 2 users

Issue metadata

Status: Verified
Owner:
Closed: Oct 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: Linux
Pri: 2
Type: Bug



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Integer-overflow in cf2_doStems

Project Member Reported by ClusterFuzz, Aug 4 2017

Issue description

Detailed report: https://clusterfuzz.com/testcase?key=6452490777395200

Fuzzer: libFuzzer_pdf_font_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  cf2_doStems
  cf2_interpT2CharString
  cf2_getGlyphOutline
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=472859:472915

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6452490777395200


Issue filed automatically.

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.
 
Cc: msrchandra@chromium.org saschap@google.com w...@gnu.org pnangunoori@chromium.org
Labels: M-63 Test-Predator-Wrong-CLs
Predator and CL could not provide any possible suspects.
Using the code search for the file, “cf2intrp.c” cc'ing the possible owner from GIT revision log.

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/third_party/freetype2.git/+/e66d7300fec2f9fc60e43a924af1972b07ee316b

@wl -- Could you please look into this issue, kindly reassign if it has nothing to do with your changes.

Thank You.
I can't – I'm not authorized to access the reproducer testcase.
Labels: CF-NeedsTriage
Labels: -CF-NeedsTriage
Owner: npm@chromium.org
Status: Assigned (was: Untriaged)
Here is the Change Log from the above CF report.

https://chromium.googlesource.com/chromium/src/+log/15cfdc4408fe45fea2657592c9bd3dbf6ade27af..ba5159d871bb21b4b151262dd9234d0261b81331?pretty=fuller&n=10000

npm@, can you please look into this if possible?

Thank you!
Project Member

Comment 5 by ClusterFuzz, Oct 17 2017

ClusterFuzz has detected this issue as fixed in range 509040:509063.

Detailed report: https://clusterfuzz.com/testcase?key=6452490777395200

Fuzzer: libFuzzer_pdf_font_fuzzer
Job Type: libfuzzer_chrome_ubsan
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  cf2_doStems
  cf2_interpT2CharString
  cf2_getGlyphOutline
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=472859:472915
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_ubsan&range=509040:509063

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6452490777395200

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.
Project Member

Comment 6 by ClusterFuzz, Oct 17 2017

Labels: ClusterFuzz-Verified
Status: Verified (was: Assigned)
ClusterFuzz testcase 6452490777395200 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

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